## Physical Properties of Crystals |

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Page 19

[In a symmetrical tensor

components is six. If the tensor is

independent components is reduced to three; the number of “degrees of freedom'

is ...

[In a symmetrical tensor

**referred**to arbitrary axes the number of independentcomponents is six. If the tensor is

**referred**to its principal axes, the number ofindependent components is reduced to three; the number of “degrees of freedom'

is ...

Page 112

Suppose that the crystal is subjected to a certain fixed stress, which is given by

components og when

to Oz. The polarization is given by P. when

Suppose that the crystal is subjected to a certain fixed stress, which is given by

components og when

**referred**to axes Oz, and by components go when**referred**to Oz. The polarization is given by P. when

**referred**to Ort, and by P, when**referred**...Page 196

or,

axes, equations (3) become simply h1 = —h; ha = -ko, ha = -ko, (5) The

representation quadric for thermal conductivity is kuz, w = 1, (6) or,

principal ...

or,

**referred**to its principal axes, k1 0 0 1. 0 k, 0 0 0 ks**Referred**to the principalaxes, equations (3) become simply h1 = —h; ha = -ko, ha = -ko, (5) The

representation quadric for thermal conductivity is kuz, w = 1, (6) or,

**referred**to theprincipal ...

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### Contents

THE GROUND WORK OF CRYSTAL PHYSICS | 3 |

Summary | 29 |

EQUILIBRIUM PROPERTIES | 45 |

47 other sections not shown

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### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dielectric direction cosines displacement elastic compliances electric field electro-optical electro-optical effect ellipsoid equal equation example expression follows forces given gives grad heat flow Hence indicatrix isothermal isotropic magnetic magnitude matrix notation measured moduli Mohr circle monoclinic number of independent Onsager's Principle optic axis optical activity orientation parallel permittivity perpendicular photoelastic effect piezoelectric effect plane plate polarization positive principal axes produced pyroelectric effect quadric radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor shear shown shows strain stress symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values wave normal wave surface written zero